CN107967888A - Gate driving circuit and its driving method, display panel - Google Patents
Gate driving circuit and its driving method, display panel Download PDFInfo
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- CN107967888A CN107967888A CN201810002723.3A CN201810002723A CN107967888A CN 107967888 A CN107967888 A CN 107967888A CN 201810002723 A CN201810002723 A CN 201810002723A CN 107967888 A CN107967888 A CN 107967888A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
- G11C19/287—Organisation of a multiplicity of shift registers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2354/00—Aspects of interface with display user
Abstract
The disclosure provides a kind of gate driving circuit and its driving method, display panel, is related to display technology field.The gate driving circuit includes multiple shift register modules, and the shift register module includes the shift register cell of multiple cascades；Each shift register module connects an independent initial signal end respectively, is separated by a preset period of time between the initial signal of different shift register modules to carry out the collection of touching signals.The disclosure can lift touch-control report point rate for large-sized monitor while narrow frame is realized.
Description
Technical field
This disclosure relates to display technology field, more particularly to a kind of gate driving circuit and its driving method, display panel.
Background technology
Display device presented the development trend of high integration and low cost in recent years.With GOA (Gate
Driver on Array, the driving of array base palte row) technology is representative, gate driving circuit is integrated in array using GOA technologies
The neighboring area of substrate, can effectively improve the integrated level of display device while narrow frame design is realized, and reduce its manufacture
Cost.
In numerous touch technologies, In Cell (embedded) touch technologies are easy with its low cost, high sensitivity, panel
The advantage such as thinned, is widely used in high-end display product.At present, In Cell touch technologies combination GOA panel
It is successfully applied in mobile touch-control product.The refreshing frequency of GOA panel is mostly 60HZ, and moves touch-control production
The screen of product is smaller, therefore the report point rate of touching signals can still meet consumer demand in 60/s.It is as shown in Figure 1, mobile
The type of drive of touch-control product is as follows：This period before being opened after the one two field picture end of scan to the scanning of another two field picture is set
The touch-control period is set to, other periods are arranged to display time interval；Public electrode is used to provide common electrode signal in display time interval
(Vcom), its output is direct current signal；And touch control electrode is made in public electrode multiplexing within the touch-control period, for providing touching signals
(Tx), its output is pulse signal.In such a mode, a frame display picture corresponds to a frame touch data report point, therefore touch-control is believed
Number report point rate be equal to display panel refreshing frequency.But the touch-control product of the large-sizes such as laptop is directed to, its
Report point rate should be above 100/s, and the GOA panel that picture refreshing frequency is 60HZ can not meet the needs of touch controllable function,
Which limits application of the In Cell touch technologies in GOA narrow side frame panels of large-size product.
It should be noted that information is only used for strengthening the reason to the background of the disclosure disclosed in above-mentioned background section
Solution, therefore can include not forming the information to the prior art known to persons of ordinary skill in the art.
The content of the invention
The purpose of the disclosure is to provide a kind of gate driving circuit and its driving method, display panel, and then at least exists
One or more problem caused by the limitation of correlation technique and defect is overcome to a certain extent.
Other characteristics and advantage of the disclosure will be apparent from by following detailed description, or partially by the disclosure
Practice and acquistion.
According to one aspect of the disclosure, there is provided a kind of gate driving circuit, including multiple shift register modules, it is described
Shift register module includes the shift register cell of multiple cascades；
Each shift register module connects an independent initial signal end, the starting of different shift register modules respectively
It is separated by a preset period of time between signal to carry out the collection of touching signals.
In a kind of exemplary embodiment of the disclosure, the shift register module, which further includes, is connected to the multiple cascade
Shift register cell end multiple cascades dummy shift register unit, the dummy shift register unit is used for
Some shift register cells for end in the shift register module provide reset signal.
In a kind of exemplary embodiment of the disclosure, the gate driving circuit further includes multiple clock signal terminals, described
The quantity of dummy shift register unit is equal to the half of the quantity of the clock signal terminal.
In a kind of exemplary embodiment of the disclosure, the gate driving circuit further includes noise reduction control signal end, described
Noise reduction control signal end is used to export a noise reduction control signal in the touch-control stage, so that each shift register cell exports one
The preset signals produced by the clock signal terminal；
Wherein, the preset signals have identical waveform with the touching signals and data-signal.
In a kind of exemplary embodiment of the disclosure, the shift register cell includes：
Input module, connection input signal end, the first power supply signal end and pull-up node, for responding input signal
The first power supply signal is transmitted to the pull-up node；
Reseting module, connection reset signal end, second source signal end and the pull-up node, resets for responding
Signal is with by second source signal transmission to the pull-up node；
Noise reduction control module, connects noise reduction control signal end and the pull-up node, for responding the noise reduction control
Signal is with by the noise reduction control signal transmission to the pull-up node；
Output module, connects the clock signal terminal, the pull-up node and signal output part, described for responding
The voltage signal of pull-up node is with by clock signal transmission to the signal output part；
Pull down control module, connect the first power supply signal end, the pull-up node, second source signal end and
Pull-down node, for responding first power supply signal first power supply signal is transmitted to the pull-down node, and
The voltage signal of the pull-up node is responded with by the second source signal transmission to the pull-down node；
Module is pulled down, connects the pull-down node, the second source signal end, the pull-up node and the signal
Output terminal, for responding the voltage signal of the pull-down node with by the second source signal transmission to the pull-up node and
The signal output part.
In a kind of exemplary embodiment of the disclosure, the gate driving circuit is also connected with time schedule controller, for obtaining
Take the signal intensity of the adjacent two frames picture corresponding to each shift register module that the time schedule controller detects, and root
It is believed that the size of number intensity of variation sequentially exports the corresponding initial signal of each shift register module in next frame.
According to one aspect of the disclosure, there is provided a kind of grid drive method, for driving above-mentioned gate driving circuit；
The driving method includes：
Independent initial signal is provided to each shift register module respectively successively, so that each shift register module
In the shift register cells of multiple cascades sequentially export fine scanning signal；
Wherein, a preset period of time is separated by between the initial signal of different shift register modules to carry out adopting for touching signals
Collection.
In a kind of exemplary embodiment of the disclosure, when the gate driving circuit further includes noise reduction control signal end,
The driving method further includes：
In the touch-control stage, a noise reduction control signal is exported to all shift register cells, so that each shift register
Unit exports the preset signals produced by clock signal terminal；
Wherein, the preset signals have identical waveform with the touching signals and data-signal.
In a kind of exemplary embodiment of the disclosure, the driving method further includes：
The signal for obtaining the adjacent two frames picture corresponding to each shift register module that time schedule controller detects becomes
Change, and first initial signal and the second starting letter are sequentially exported in next frame according to the size of signal intensity degree
Number.
According to one aspect of the disclosure, there is provided a kind of display panel, including above-mentioned gate driving circuit.
Gate driving circuit and its driving method that disclosure illustrative embodiments are provided, display panel, by right
GOA circuits carry out block design, so that it is divided into multiple shift register modules, and each shift register module are used
Independent initial signal is controlled, so as to be spaced certain period between the output signal of each shift register module, is led to
The collection that touching signals are carried out in each interval period is crossed, can so make the report point rate of touching signals relative to GOA circuits
Refreshing frequency is significantly improved, so as to lift the reaction speed of touch-control product.
It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not
The disclosure can be limited.
Brief description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and be used to together with specification to explain the principle of the disclosure.It should be evident that drawings in the following description are only the disclosure
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 schematically shows the driver' s timing figure of touch-control product in the prior art；
Fig. 2 schematically shows the level link composition of GOA circuits in the prior art；
Fig. 3 schematically shows the output signal timing diagram of GOA circuits in the prior art；
Fig. 4 schematically shows the piecemeal control schematic diagram of GOA circuits in one exemplary embodiment of the disclosure；
Fig. 5 schematically shows the cascade structure signal of the shift register module in one exemplary embodiment of the disclosure
Figure；
Fig. 6 schematically shows the signal timing diagram of GOA circuits in one exemplary embodiment of the disclosure；
Fig. 7 schematically shows the piecemeal control schematic diagram of GOA circuits in disclosure another exemplary embodiment；
Fig. 8 schematically shows the cascade structure signal of a shift register module in disclosure another exemplary embodiment
Figure；
Fig. 9 schematically shows the circuit structure signal of a shift register cell in disclosure another exemplary embodiment
Figure；
Figure 10 schematically shows the signal timing diagram of GOA circuits in the exemplary another embodiment of the disclosure；
Figure 11 schematically shows the scan mode schematic diagram of display picture in disclosure exemplary embodiment；
Figure 12 schematically shows the response time schematic diagram of display picture in disclosure exemplary embodiment；
Figure 13 schematically shows the flow chart of grid drive method in disclosure exemplary embodiment.
Embodiment
Example embodiment is described more fully with referring now to attached drawing.However, example embodiment can be real in a variety of forms
Apply, and be not understood as limited to example set forth herein；On the contrary, these embodiments are provided so that the disclosure will more comprehensively and
Completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, structure or characteristic
It can be incorporated in any suitable manner in one or more embodiments.In the following description, there is provided many details
Embodiment of the disclosure is fully understood so as to provide.It will be appreciated, however, by one skilled in the art that the disclosure can be put into practice
Technical solution and omit it is one or more in the specific detail, or can use other methods, constituent element, device,
Step etc..In other cases, known solution is not shown in detail or describes to avoid making each side of the disclosure become mould
Paste.
In addition, attached drawing is only the schematic illustrations of the disclosure, it is not necessarily drawn to scale.The thickness of each layer in attached drawing
Do not reflect actual proportions with shape, be merely for convenience and purposes of illustration content of this disclosure.Identical reference numeral represents identical in figure
Or similar part, thus repetition thereof will be omitted.
Fig. 2 is the cascade structure schematic diagram of tradition GOA circuits.Since the cascade connection between GOA unit 20 is simple
Input/reset relation, such as input signal of the output signal as next stage GOA unit 20 of upper level GOA unit 20, and under
Reset signal of the output signal of level-one GOA unit 20 as upper level GOA unit 20, therefore the output waveform of the GOA circuits
It is only the displacement output waveform line by line shown in Fig. 3.Based on this, believed by interting touch-control in interval time between frames
Number realize its touch controllable function, the touch-control report point rate which limits GOA panel only have to be equal to its refreshing frequency, and it refreshes frequency
Rate is usually in below 100HZ, so as to limit the In Cell touch technologies of large scale product answering in GOA narrow side frame panels
With.
This example embodiment provides a kind of gate driving circuit, GOA circuits can be used to carry out piecemeal driving.Such as Fig. 4
Shown in Fig. 5, the gate driving circuit can include multiple shift register modules 40, and the shift register module 40 can
With the shift register cell 400 including multiple cascades, all shift register cells in all shift register modules 40
400 are provided commonly for completing the scanning of a two field picture.
Wherein, each shift register module 40 connects an independent initial signal end STV, different shift registers respectively
It is separated by a preset period of time between the initial signal of module 40 using as the touch-control period, for carrying out the collection of touching signals.
Refering to what is shown in Fig. 4, by taking gate driving circuit includes two shift register modules 40 as an example, the first shift register
It is pre- to be separated by one between first initial signal STV1 of module 40 and the second initial signal STV2 of the second shift register module 40
If the period, the first starting of the second initial signal STV2 and the first shift register module 40 of the second shift register module 40
A preset period of time is also separated by between signal STV1, then in each interval period between different shift register modules 40 just
The collection of touching signals can be carried out, i.e., the collection of multiple touching signals can be interspersed with the scanning process of a two field picture, therefore
The report point rate of touching signals is more than the refreshing frequency of GOA circuits.
It should be noted that：Quantity and each shift register module of the present embodiment for shift register module 40
The quantity of shift register cell 400 is not especially limited in 40, it can be set according to the true resolution of GOA panel
Meter, such as FHD (Full High Definition, full HD) product that resolution ratio is 1920 × 1080 can include 2 shiftings
Bit register module 40, each shift register module 40 include 540 shift register cells 400, can so meet
The demand of large scale GOA contact panels.
The gate driving circuit that disclosure illustrative embodiments are provided, by carrying out block design to GOA circuits, with
It is divided into multiple shift register modules 40, and each shift register module 40 is carried out using independent initial signal
Control, so as to certain period is spaced between the output signal of each shift register module 40, by each interval period
The interior collection for carrying out touching signals, can so be such that the report point rate of touching signals is obtained substantially relative to the refreshing frequency of GOA circuits
Lifting, so as to lift the reaction speed of touch-control product.
In this example embodiment, the displacement that the shift register module 40 can also include being connected to multiple cascades is posted
Virtual (Dummy) shift register cell of multiple cascades of 400 end of storage unit, the dummy shift register unit can use
Several shift register cells 400 of end provide reset signal in for the shift register module 40.Wherein, the grid
Pole drive circuit can also include multiple clock signal terminal CLK, when the quantity of the dummy shift register unit can be equal to
The half of clock signal end quantity.
Refering to what is shown in Fig. 5, by taking FHD (resolution ratio 1920x1080) product of 6CLK as an example, the gate driving circuit includes
Two shift register modules 40.It can include 540 shift register cells 400 in first shift register module 40, by
First initial signal STV1 provides open signal and believes from the 1st output signal OUT1 successively cascaded-output to the 540th output
Number OUT540, first shift register module 40 can be used for the scanning signal of the 1st~540 row of output；Second shift register
It can also include 540 shift register cells 400 in module 40, open signal is provided and from the by the second initial signal STV2
541 output signal OUT541 successively cascaded-output to the 1080th output signal OUT1080, second shift register module
40 can be used for the scanning signal of the 541st~1080 row of output.Respectively there are three virtual displacements in each shift register module 40
Register cell, resets letter for being provided for last three-level shift register cell 400 in corresponding shift register module 40
Number.
Based on this, the first half is included within the time of a frame and shows time DP1, n-th touch-control time TPn, later half shows
Show time DP2And the N+1 times touch-control time TP(n+1).Fig. 6 shows the waveform timing chart of each signal.Wherein, COM electrodes
As the public electrode and the touch control electrode of touch-control period of display time interval, have and display voltage is provided and gathers the double of touching signals
Recast is used, therefore the COM signals of the COM electrodes provide direct current signal in display time interval planted agent, and is provided in touch-control period planted agent
Square-wave signal.In the present embodiment, due to gathering touching signals twice in a frame time, the report point rate of touching signals is
Twice of display refreshing frequency.But the present embodiment is not limited thereto, if GOA circuits are divided into three shift register modules
40 and by single initial signal independent control, then the report point rate of touching signals is then three times of display refreshing frequency, with this
Analogize.
In this example embodiment, as shown in Figure 7 and Figure 8, the gate driving circuit can also include noise reduction control letter
Number end TC, noise reduction control signal end TC can be used for the touch-control stage export a noise reduction control signal so that each shift LD
Device unit 400 exports the preset signals produced by clock signal terminal CLK；Wherein, the preset signals preferably with touching signals
And data-signal has identical waveform, for reducing the pressure difference between scanning signal and data-signal and touching signals,
So as to reduce the noise of touching signals.
Based on this, the present embodiment can be above-mentioned to realize by the circuit structure of the shift register cell 400 shown in Fig. 9
Function.Wherein, noise reduction control signal end TC can be saved in the shift register cell 400 by a unidirectional transistor and pull-up
Point PU is connected, and in the touch-control period, the noise reduction control signal is high level, then pull-up node PU is driven high, and signal output part OUT is defeated
The preset signals of clock signal terminal CLK offers are provided.It should be noted that clock signal terminal CLK provided in the touch-control period it is pre-
If the touching signals that signal should be provided with COM electrodes are identical signal.In other periods, the noise reduction control signal is placed in
Low level, can so ensure that shift register cell 400 is unaffected in display time interval.
Specifically, refering to what is shown in Fig. 9, the shift register cell 400 can include：
Input module 901, connection input signal end INPUT, the first power supply signal end VGH and pull-up node PU, is used for
Input signal is responded so that the first power supply signal is transmitted to pull-up node PU；Wherein, which can for example include one
The control terminal connection input signal end INPUT of transistor M1, transistor M1, first end connect the first power supply signal end VGH, the
Two ends connection pull-up node PU.
Reseting module 902, connection reset signal end RESET, second source signal end GCL and pull-up node PU, is used for
Reset signal is responded with by second source signal transmission to pull-up node PU；Wherein, which can for example include one
The control terminal connection reset signal end RESET of transistor M2, transistor M2, first end connection second source signal end GCL, the
Two ends connection pull-up node PU.
Noise reduction control module 903, connects noise reduction control signal end TC and pull-up node PU, for responding noise reduction control letter
Number with by noise reduction control signal transmission to pull-up node PU；Wherein, which can for example include a transistor
Control terminal and the first end of M3, transistor M3 are all connected with noise reduction control signal end TC, second end connects pull-up node PU.
Output module 904, connection clock signal terminal CLK, pull-up node PU and signal output part OUT, for response
The voltage signal of node PU is drawn with by clock signal transmission to signal output part OUT；Wherein, which for example can be with
Including a transistor M4 and a capacitance C, control terminal connection pull-up node PU, the first end connection clock signal terminal of transistor M4
CLK, second end connect signal output part OUT, and capacitance C is connected between pull-up node PU and signal output part OUT.
Pull down control module 905, connection the first power supply signal end VGH, pull-up node PU, second source signal end GCL, with
And pull-down node PD, for responding the first power supply signal the first power supply signal is transmitted to pull-down node PD, and in response
The voltage signal of node PU is drawn so that second source signal GCL is transmitted to pull-down node PD；Wherein, the drop-down control module 905
Such as transistor M5 to transistor M8 can be included, the control terminal and first end of transistor M5 are all connected with the first power supply signal end
VGH, the control terminal of second end connection one drop-down control node PD-CN, transistor M6 connect the first power supply signal end VGH, first
End connection pulls down control node PD-CN, the control terminal of second end connection pull-down node PD, transistor M7 connect pull-up node PU,
The control terminal connection of first end connection second source signal end GCL, second end connection drop-down control node PD-CN, transistor M8
Pull-up node PU, first end connection second source signal end GCL, second end connection pull-down node PD.
Pull down module 906, connection pull-down node PD, second source signal end GCL, pull-up node PU and signal output part
OUT, for responding the voltage signal of pull-down node PD with by second source signal transmission to pull-up node PU and signal output part
OUT；Wherein, which can include transistor M9 and transistor M10, the control terminal connection drop-down section of transistor M9
Under point PD, first end connection second source signal end GCL, the control terminal of second end connection pull-up node PU, transistor M10 connect
Draw node PD, first end connection second source signal end GCL, second end connection signal output part OUT.
It should be noted that：Modules can pass through transistor and capacitance in the shift register cell 400
Various combination mode realizes that the circuit structure that the present embodiment is provided is merely illustrative, and other circuit connecting relations are only
Above-mentioned function can be realized, within protection scope of the present invention.
With reference to shown in figure 7 and Fig. 8, still by taking FHD (resolution ratio 1920x1080) product of 6CLK as an example, the raster data model
Circuit includes two shift register modules 40.It can include 540 shift register lists in first shift register module 40
Member 400, open signal is provided and from the 1st output signal OUT1 successively cascaded-output to the 540th by the first initial signal STV1
A output signal OUT540, first shift register module 40 can be used for the scanning signal of the 1st~540 row of output；Second moves
It can also include 540 shift register cells 400 in bit register module 40, be provided by the second initial signal STV2 and open letter
Number and posted from the 541st output signal OUT541 successively cascaded-output to the 1080th output signal OUT1080, second displacement
Buffer module 40 can be used for the scanning signal of the 541st~1080 row of output.Respectively there are three in each shift register module 40
Dummy shift register unit, for being carried for last three-level shift register cell 400 in corresponding shift register module 40
For reset signal.Unlike the embodiment in Fig. 4 and Fig. 5, the gate driving circuit in the present embodiment is also connected with a noise reduction
Control signal end TC, for exporting a noise reduction control signal in the touch-control period, so that each shift register cell 400 exports
One preset signals produced by clock signal terminal CLK, the touching signals and source driving electricity which provides with COM electrodes
The data-signal that road provides is identical signal.
Based on this, the first half is included within the time of a frame and shows time DP1, n-th touch-control time TPn, later half shows
Show time DP2And the N+1 times touch-control time TP(n+1).Figure 10 shows the waveform timing chart of each signal.Wherein, COM electricity
Public electrode and the touch control electrode of touch-control period of the pole as display time interval, have and provide display voltage and gather touching signals
Double action, therefore the COM signals of the COM electrodes provide direct current signal in display time interval planted agent, and carried in touch-control period planted agent
For square-wave signal.In addition, scanning signal and data-signal have identical waveform with touching signals within the touch-control period, so
The parasitic capacitance between grid line and data cable and touch control electrode can be effectively reduced, by parasitic capacitance for touching signals
Influence minimizes, so as to ensure touch-control best results.In the present embodiment, due to gathering touch-control letter twice in a frame time
Number, therefore the report point rate of touching signals is twice of display refreshing frequency.But the present embodiment is not limited thereto, if GOA
Circuit is divided into three shift register modules 40 and by single initial signal independent control, then the report point rate of touching signals is then
Three times of display refreshing frequency, and so on.
In this example embodiment, the gate driving circuit can also be with TCON (Timing Controller, sequential
Controller) it is connected, the TCON can be used for the signal for detecting the adjacent two frames picture corresponding to each shift register module 40
Change, and existed according to the size of signal intensity degree to gate driving circuit output timing control signal, the gate driving circuit
Receive after the timing control signal of TCON transmissions that can sequentially to export each shift register module 40 in next frame corresponding
Initial signal.
By taking gate driving circuit includes two shift register modules 40 as an example, with reference to shown in figure 11, according to raster data model
Display picture can be divided into two parts i.e. first area 111 and second area 112 up and down by the scan mode of circuit；Wherein, first
Region 111 can be controlled by the first shift register module 40 and provide open signal, the secondth area by the first initial signal STV1
Domain 112 can be controlled by the second shift register module 40, and provide open signal by the second initial signal STV2.
Based on this, the scan mode of the first frame can be scanned from the top down, and the first initial signal STV1 is at this time
First shift register module 40 provides open signal, and first time touch-control is carried out after the completion of the output of the first shift register module 40
The collection of signal；Then the second initial signal STV2 provides open signal for the second shift register module 40, and the second displacement is posted
Buffer module 40 carries out the collection of second of touching signals after the completion of exporting.
On this basis, TCON detects the signal of the signal intensity situation, wherein second area 112 of adjacent two frames picture
Change is violent, the signal intensity of first area 111 is slight.At this time, second will first be exported when carrying out the scanning of next frame
Beginning signal STV2 then carries out the collection of first time touching signals to realize the output of the second shift register module 40；Then
The first initial signal STV1 is exported again to realize the output of the first shift register module 40, then carries out second of touching signals
Collection.Come from the time, as shown in figure 12, second area 112 is after former frame charging complete not by the guarantor of field
Hold the time, but the updating the data again when next frame just starts, therefore the refreshing frequency increase in the region so that response
Speed is accelerated, so as to improve the display quality of picture.
In the present embodiment, if the quantity increase of shift register module 40, then more increasingly complex by setting
Dynamic response regulative mode such as forward scan and reverse scan, can also further lift the display quality of picture.
This example embodiment additionally provides a kind of grid drive method, for driving above-mentioned gate driving circuit.Institute
Stating grid drive method can include：Independent initial signal is provided to each shift register module 40 respectively successively, so that
The shift register cell 400 of multiple cascades in each shift register module 40 sequentially exports fine scanning signal；Wherein,
It is separated by a preset period of time between the initial signal of different shift register modules 400 to carry out the collection of touching signals.
With reference to shown in figure 4 and Fig. 7, by taking the gate driving circuit including two shift register modules 40 as an example, such as Figure 13
Shown, the grid drive method can specifically include：
S1, to the first shift register module provide the first initial signal STV1 so that in the first shift register module
The shift register cells 400 of multiple cascades sequentially export fine scanning signal；
S2, to the second shift register module provide the second initial signal STV2 so that in the second shift register module
The shift register cells 400 of multiple cascades sequentially export fine scanning signal；
Wherein, a preset period of time is separated by between the first initial signal STV1 and the second initial signal STV2 to carry out touch-control letter
Number collection.
By taking the GOA circuits shown in Fig. 4 and Fig. 5 as an example, the specific driver' s timing of the grid drive method can be：First
The initial signal STV1 of shift register module opens high level to promote each displacement in the first shift register module to post
Storage unit 400 carries out displacement output, and all grid lines remain low level after end of output, and touching signals are driven by source at this time
Dynamic circuit feeds COM electrodes and completes the scanning of a frame；The initial signal STV2 of second shift register module after the end of scan
High level is opened to promote each shift register cell 400 in the second shift register module to carry out displacement output, is exported
After carry out the scanning of touching signals again and repeat the above process, until whole frame picture completes write-in and touching signals are completed
Scanning.
The grid drive method that disclosure illustrative embodiments are provided, by being adopted to multiple shift register modules 40
It is controlled with independent initial signal so that when being spaced certain between the output signal of each shift register module 40
Section, to carry out the collection of touching signals in each interval period, can so make the report point rate of touching signals relative to GOA circuits
Refreshing frequency be significantly improved, so as to lift the reaction speed of touch-control product.
Based on this, in the case where the gate driving circuit further includes noise reduction control signal end TC, the raster data model
Method can also include：
S3, in the touch-control stage, a noise reduction control signal is exported to all shift register cells 400, so that each displacement
Register cell 400 exports the preset signals produced by clock signal terminal, the preset signals and touching signals and data
Signal has identical waveform.
So, by the way that scanning signal and data-signal to be disposed as to have phase with touching signals within the touch-control period
Same waveform, can so effectively reduce the pressure difference between scanning signal and touching signals, so as to reduce touching signals
Noise, ensures optimal touch-control effect.
In this example embodiment, the grid drive method can further include：
The signal for the adjacent two frames picture corresponding to each shift register module 40 that S4, acquisition TCON are detected becomes
Change, and the first initial signal STV1 and the second initial signal are sequentially exported in next frame according to the size of signal intensity degree
STV2。
So, if the signal intensity for the display area that TCON refreshes after detecting in former frame picture is violent, and
The signal intensity for the display area first refreshed is slight, then will first refresh when next frame picture starts and change violent display
The signal in region, then refreshes the signal for changing slight display area.Based on this, according to the signal intensity situation of every frame picture
Scanning sequency and mode to each shift register module 40 carry out rearranging output, with before and after increase frame signal change compared with
The refreshing frequency of big display area, can so accelerate the response speed of picture, so as to lift the display quality of picture.
It should be noted that the scanning sequency described in the present embodiment can both refer between different shift register modules 40
Priority scanning sequency, can also refer to any shift register module 40 and use forward scan or reverse scan, here to this not
Make specific limit.
It should be noted that：The detail of the grid drive method carries out in corresponding gate driving circuit
Detailed description, which is not described herein again.
This example embodiment additionally provides a kind of GOA display panels, including above-mentioned gate driving circuit.The grid drives
Dynamic circuit and its driving method can improve the report point rate of touching signals while narrow frame is realized, moreover it is possible to expand the dynamic of picture
Display effect, and all GOA display panels can be suitable for.
Wherein, the display panel can for example include mobile phone, tablet computer, television set, laptop, digital phase
Any product or component with display function such as frame, navigator, the disclosure is to this without particular determination.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice invention disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principle of the disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
It should be appreciated that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by appended claim.
Claims (10)
- A kind of 1. gate driving circuit, it is characterised in that including multiple shift register modules, the shift register module bag Include the shift register cell of multiple cascades；Each shift register module connects an independent initial signal end, the initial signal of different shift register modules respectively Between be separated by a preset period of time to carry out the collection of touching signals.
- 2. gate driving circuit according to claim 1, it is characterised in that the shift register module further includes connection In the dummy shift register unit of multiple cascades of the shift register cell end of the multiple cascade, the virtual displacement Register cell is used to provide reset signal for some shift register cells of end in the shift register module.
- 3. gate driving circuit according to claim 2, it is characterised in that when the gate driving circuit further includes multiple Clock signal end, the quantity of the dummy shift register unit are equal to the half of the quantity of the clock signal terminal.
- 4. gate driving circuit according to claim 3, it is characterised in that the gate driving circuit further includes noise reduction control Signal end processed, the noise reduction control signal end is used to export a noise reduction control signal in the touch-control stage, so that each shift LD Device unit exports the preset signals produced by the clock signal terminal；Wherein, the preset signals have identical waveform with the touching signals and data-signal.
- 5. gate driving circuit according to claim 4, it is characterised in that the shift register cell includes：Input module, connection input signal end, the first power supply signal end and pull-up node, for responding input signal with general First power supply signal is transmitted to the pull-up node；Reseting module, connection reset signal end, second source signal end and the pull-up node, for responding reset signal With by second source signal transmission to the pull-up node；Noise reduction control module, connects noise reduction control signal end and the pull-up node, for responding the noise reduction control signal With by the noise reduction control signal transmission to the pull-up node；Output module, connects the clock signal terminal, the pull-up node and signal output part, for responding the pull-up The voltage signal of node is with by clock signal transmission to the signal output part；Control module is pulled down, connects the first power supply signal end, the pull-up node, second source signal end and drop-down Node, for responding first power supply signal first power supply signal is transmitted to the pull-down node, and response The voltage signal of the pull-up node is with by the second source signal transmission to the pull-down node；Module is pulled down, connects the pull-down node, the second source signal end, the pull-up node and the signal output End, for responding the voltage signal of the pull-down node with by the second source signal transmission to the pull-up node and described Signal output part.
- 6. gate driving circuit according to claim 1, it is characterised in that the gate driving circuit also with timing control Device is connected, the adjacent two frames picture corresponding to each shift register module detected for obtaining the time schedule controller Signal intensity, and the corresponding starting of each shift register module is sequentially exported in next frame according to the size of signal intensity degree Signal.
- A kind of 7. grid drive method, for driving claim 1-6 any one of them gate driving circuits；Its feature exists In the driving method includes：Independent initial signal is provided to each shift register module respectively successively, so that in each shift register module The shift register cell of multiple cascades sequentially exports fine scanning signal；Wherein, a preset period of time is separated by between the initial signal of different shift register modules to carry out the collection of touching signals.
- 8. grid drive method according to claim 7, it is characterised in that further include noise reduction in the gate driving circuit During control signal end, the driving method further includes：In the touch-control stage, a noise reduction control signal is exported to all shift register cells, so that each shift register cell The preset signals that output one is produced by clock signal terminal；Wherein, the preset signals have identical waveform with the touching signals and data-signal.
- 9. grid drive method according to claim 7, it is characterised in that the driving method further includes：The signal intensity of the adjacent two frames picture corresponding to each shift register module that time schedule controller detects is obtained, and First initial signal and second initial signal are sequentially exported in next frame according to the size of signal intensity degree.
- 10. a kind of display panel, it is characterised in that including claim 1-6 any one of them gate driving circuits.
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| CN201810002723.3A CN107967888B (en) | 2018-01-02 | 2018-01-02 | Gate drive circuit, drive method thereof and display panel |
| US16/039,209 US10810921B2 (en) | 2018-01-02 | 2018-07-18 | GOA circuit, method for driving the same and display panel |
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Also Published As
| Publication number | Publication date |
|---|---|
| US10810921B2 (en) | 2020-10-20 |
| CN107967888B (en) | 2021-01-15 |
| US20190206293A1 (en) | 2019-07-04 |
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